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Peter Capaldi poses with fans during filming for Doctor Who in Cardiff
Copyright: Rex Features Polly Thomas
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Mark Gatiss - who has written for Capaldi's Time Lord - recently told Digital Spy that the Scottish actor brings with him "a whole new set of rules".

"The Doctor's always the Doctor - but you can have a lot of fun playing with people's expectations," Gatiss teased. "Everyone knows how the previous Doctor would react in any given situation - and now you just don't know!"